The Application Of High-elastic And High-viscous Bitumen Ultra-thin Wear Layer On The Road Reconstruction Project

Ultra-thin wear layer is a new type of pavement maintenance technology.Althoughthe design thickness is relatively thin (15mm~25mm).But in solving minor cracks,pavement loose.surface lean. rutting (less than15mm). surface water seepage，aging andso the effect is significant. Therefore it often used in old asphalt pavement functionalrecovery. In addition to，The ultra-thin wear layer applied on the new road surfacefunctional layer. Not only to a certain extent to ensure the quality of the road traffic, butalso extend the life of the road. So it has gradually been recognized by society.This paper selected can be used in Ultra-thin wear layer of three grading：Gap-graded SMA,open-graded the OGFC,semi-open-graded NovaChip TypeB. Changein grading, while asphalt binder also change accordingly. By laboratory tests on thecomposition of the material in the physical performance mix design as well as basicresearch on road performance. After analysis can know when to change the asphaltbinder type, semi-open-graded NovaChip TypeB better overall stability, high strengthagainst external damage.While for ultra-thin layers of asphalt requirements, configurethe high-elastic viscous bitumen. Although the same kind of grading, the application ofthe asphalt make the best oil is greatly improved, but it is strongly adhesion betweenmineral aggregate, filling the road greatly improved in terms of resistance to waterdamage.Finally, considering that in this paper the technical requirements for ultra-thin wearlayer, high elastic viscous and semi-open-graded asphalt NovaChip TypeB combined inthe Wuyi Road,Fuzhou road reconstruction project.The construction uses a synchronousconstruction technology, strict construction process, and finally acceptance testing ofpavement wear layer specifications can meet the technical requirements. Through thisresearch,the overall economic efficiency and social benefits,the high viscosity of asphaltwear thin elastic layer can be further promoted and applied in urban road reconstruction.And hoped to be able to bring help to the further development of China’s ultra-thin wearlayer and reference.